Beginning with a definition of the problem, including the temperature. Heat supply pipe network project of shandong huangtai. In this project, heat pipes are explored for use in tpv energy conversion systems. To demonstrate the feasibility of a heatpipe forced convection cooler. The abi infrared detectors need to be cold to accurately measure the thermal energy radiated from the earths atmosphere. Furthermore, the heat pipes will operate in a horizontal position. The heat pipe is composed of a container lined with a wick that is filled with liquid near its saturation temperature. Heat transfer heat transfer introduction practical occurrences, applications, factors affecting heat transfer categories and modes of heat transfer conduction in a slab and across a pipe convection free natural and forced in a pipe and over a solid object. This effect is similar to placing a paper towel in coffee, and watching the fluid rise up the paper towel. In this project heat pipe has been fabricated by using copper material as a container and. Get a grip on the nuts and bolts of holding your project together with this guide on fasteners. Main heat source of this system comes from xibu thermoeletric plant.
Apr 27, 20 engineering senior design project double pipe heat exchanger university of central oklahoma. The application of heat pipes should be considered when the thermal design is either conduction limited or when nonthermal goals such as weight cannot be achieved with other materials such as solid aluminum andor copper. If heat pipe pa take out and let ai below sol end of a heatp ipe 1015 mm. New technology demonstration program, kennedy space center, hangar l heat pipe project. What is a heat pipe heat pipes basics and technology. Ats engineering ebook advanced thermal solutions, inc. Design considerations when using heat pipes electronics. Used to cool transistors and high density semiconductors.
In a standard heat pipe, the inside of the container is lined with a wicking material. This tool is intended to provide the designer with the capability to perform a preliminary design selection and to evaluate. Designing and building a heat pipe demonstration unit for a. Explore heat pipe with free download of seminar report and ppt in pdf and doc format. R sekulib university of kentucky introduction a heat exchanger is a device that is used for transfer of thermal energy enthalpy between two or more fluids, between a solid surface and a fluid, or between solid particulates and a. A loop heat pipe with coherent pores integrated to the heat source is considered as a calculation model in this paperfig. Loop heat pipe with coherent porous wick since the porous material used for current heat pipes is usually stochastic structure, it is hard to apply analytical or numerical methods for design optimization. Development of a large diameter pulsating heat pipe. Design, construction and analysis of a flat heat pipe dtic. Also explore the seminar topics paper on heat pipe with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020.
Engineering senior design project double pipe heat exchanger. It describes the variety of complex and coupled processes of heat and mass transfer in heat pipes. The design of a heat pipe is rather complex with many things to consider. Uphos project aims at analysing and characterising the behaviour of a large diameter pulsating heat pipe php on board rexus 22 sounding rocket. Heat pipe science and technology mechanical engineering. Aerospace cool satellite solar array, as well as shuttleleading edge during reentry. Mercedes benz project report for mechanical final year students. Several factors have contributed to the science and technology of the present stateofart heat pipe leading to the development of loop heat pipes, micro and miniature heat pipes and micro loop heat pipes. A heat pipe is a device that effortlessly transports thermal energy from its one point to the other. The double pipe heat exchanger is one of the simplest types of heat exchangers. Introduction heat pipe is a capillary twophase heat transfer device. If a heat pipe length is larger than 150 mm, at 5 oc it. Jacob perkins descendant of angier march patented the perkins tube in 1936 and.
The default working environment for geometry is 3d. Goes17 loop heat pipe fact sheet role of the advanced baseline imager abi loop heat pipe loop heat pipes keep the abi at the correct operating temperatures. The high thermal conductivity enables a heat pipe to transfer, and dissipate heat to a more convenient location through a capillary action. A rule of thumb for the effective thermal conductivity of a heat pipe is 4000 wmk. Typical teams will have 46 students, with engineering disciplines assigned based on the anticipated scope of the project. Heat pipe science and technology, an international journal is encompassed on publishing i fundamental studies of heat and mass transfer in heat pipes and twophase thermosyphons, ii new streams of technology development, iii industrial innovation in electronic thermal control, air conditioning, heating and cooling, aerospace thermal control. The aerospace industry has been a proving ground for heat pipe reliability, and has been used for decades in harsh and demanding environments. Download our heat pipes white paper below to find out more about how heat pipes work and the types of projects they are suitable for.
It applies the implied heat of the vaporized working fluid instead of the reasonable heat. Efficient heat transferefficient heat transfer boiling and condensationboiling and condensation small temperature difference between the heat source and. Flanges can be added on the outer surface for easy integration with instruments or radiators the flange is an integral part of the extrusion. Plant and linuo boiler house, forming four looped heat supply pipe network systems in the western, central, eastern and southern parts. It utilizes the latent heat of the vaporized working fluid instead of the sensible heat. Space for the vapour travel is provided inside the tank.
Wraparound heat pipe heat exchanger wahx selection tool. Heat pipes and its applications lunds tekniska hogskola. The test section consists of a long electrical surface heater on the tube which serves as a constant heat flux source on the flowing medium. Mathematical model for heat transfer limitations of heat pipe. A heatpipe is a sealed copper tube that is under vacuum, and can transfer heat rapidly away from the source. This project report contains experimental illustration of forced convective heat transfer rig, which consist of a tube, through which air is sent in by a blower. The heat pipe is a vaporliquid phasechange device that transfers heat from a hot reservoir to a cold reservoir using capillary forces generated by a wick or porous material and a working fluid.
Jessica holmes calvin lam bradford marx andrew nelson. This program will assist the hvac design engineer in the proper selection of a wraparound heat pipe heat exchanger wahx and provide energy savings estimates. This intricately geared 7segment display gives a gorgeous view of your subscriber count. The objective of this analysis project was twofold. Lee mason, nasa kilopower overview and mission applications. The areas of thermal projects listed in this article are as follows i. Heat supply pipe network project of shandong huangtai power plant resettlement action plan shandong huangtai power plant east china investigation and design institute under checc rp619. Introduction a heat pipe is a device that efficiently transports thermal energy from its one point to the other. However, in an actual application when a heat pipe is soldered or epoxied to the base of a heat sink, the effective thermal conductivity of the heat pipe may be drastically reduced due to the extra thermal resistances added by the bonding.
Heat transfer equipment in hot services, other than coolers and condensers. Heat pipe working principle seminar projects topics. Historical perspectives, principles of operations, types of heat pipes are discussed. The liquid evaporates into a gas that travels to the cooler end of the pipe, condenses back into liquid. Boiler blowdown heat recovery project reduces steam. The heat pipes used on the pipeline were specially designed for the project. A heat exchanger is a device that is used to transfer thermal energy enthalpy between two or more fluids, between a solid surface and a fluid, or between solid particulates and a fluid, at different temperatures and in thermal contact. Heat supply pipe network project of shandong huangtai power plant. Control of boiler operation using plcscada mechanical 2011 project.
Design of forced convection heat transfer rig project topics. Design and demonstration of a heat exchanger for a compact. Enter double pipe workbench in file name as a name of your workbench and click on save button. New technology demonstration program, kennedy space center. The pipeline is not the first project where heat pipes have been used in this manner.
Heat transfer heat transfer introduction practical occurrences, applications, factors affecting heat transfer categories and modes of heat transfer conduction in a slab and across a pipe convection free natural and forced in a pipe and over a solid object determination of convective heat transfer coefficient. The book consists of fourteen chapters, two appendices, and over 400 illustrations, along with numerous presents basic and advanced techniques in the analytical and numerical modeling of various heat pipe systems under a variety of operating. A heat pipe is a heattransfer device that combines the principles of both thermal conductivity. International heat pipe conference in 1999, regarding operating conditions, dr. The vapor then travels along the heat pipe to the cold interface. Aug 17, 2015 heat exchanger design project chinedu charles isiadinso august 17, 2015 contents 1 introduction 2 2 design brief 2 3 theory 2 3.
A heat pipe is a heattransfer device that combines the principles of both thermal conductivity and phase transition to effectively transfer heat between two solid interfaces at the hot interface of a heat pipe a liquid in contact with a thermally conductive solid surface turns into a vapor by absorbing heat from that surface. To achieve the requirements set out in the brief, i considered variable factors affecting heat exchange e. Dec 06, 2011 mechanical projects on modeling and fatigue analysis of automotive wheel rim. This curve is a guide to help estimate heat transport capacity for acts copperwater heat pipes using common wick structures. Polasek stated that thefor successful operation of an oscillating heat pipe, liquid plugs and vapor bubbles must coexist inside the capillary tube along its length. Please provide your estimate of staffing in the below table. Dehumidifier heat pipes dhp engineering specifications. In this chapter, heat pipe manufacturing methods are examined with the goal of establishing costeffective procedures that will ultimately result in cheaper and more reliable heat pipes. Enter doublepipeworkbench in file name as a name of your workbench and click on save button. Choosing a backup generator plus 3 legal house connection options transfer switch and more duration. Pdf heat pipe utilizes continuous phase change process within a. During heat pipe operation, working fluid is vaporized in the evaporator, and then condensed in the condenser, transferring heat the first step in selecting a heat pipe working fluid and envelopewick material is to determine the. Each pvc pipe project plan has an easytofollow adobe pdf document for download, as well as an accompanying trimble sketchup file.
Performance of heat pipe for different working fluids and fill ratios journal of mechanical engineering, vol. Air handlers or packaged air conditioning equipment shall be equipped with dehumidifier heat pipes supplied by heat pipe technology, inc. Heat pipes seminar ppt with pdf report study mafia. Pdf in this chapter, heat pipe manufacturing methods are examined with the goal of. Heat pipes hardware m t l l i t b ith th i fmetal aluminum tube with grooves on the inner surface cold t ild extrusion grooves are filled with the working fluid water, ammonia, propylene, etc. Transports heat from a heat source to a heat sink works as an isothermalizer why twophase thermal system. Di pipe to eliminate the loss of 115 million gallons of water per year. Performance evaluation report period of performance june 1996 to february 1998 c. Double pipe heat exchanger transport 2 project duration. Methods of improving performance of the gas turbine mech document. Boiler blowdown heat recovery project reduces steam system.
Thermal engineering projects plays a vital role in the field of thermal engineering. The detectors need to be cooled to varying degrees. If a heat pipe length is less than 150 mm, at 40c it passes. Design using catia software and fabrication of the heat pipe is done. When selecting the diameter and length of heat pipe it is important to consider the orientation with respect to gravity. Pipe heat exchangers project standards and specifications page 4 of 8 rev. Aavid thermalloy for assisting us with obtaining heat pipes in a timely manner and alleviating the cost of our project.
Project standards and specifications page 3 of 32 rev. The temperature of the heat sink was critical as it had to be able to adequately cool the attached electronics. Experimental method figure 2 below shows an experimental test rig that used for the experiment. Heat exchangers power industries use heat pipe heatexchangers as. It is called a double pipe exchanger because one fluid flows inside a pipe and the other fluid flows between that pipe and another pipe that surrounds the first.
Design considerations when using heat pipes electronics cooling. A good description of the history of the heat pipe technology can be found in an early article published by yale eastman currently a director of act in scientific american in may 1968. Office of industrial technologies oit forest products bestpractices technical case study subject. This page contains heat pipes seminar and ppt with pdf report. Hancock paul reeves mountain energy partnership boulder, colorado march 1999 nrelsr71024738. The paper presents an overview of heat pipes, especially those used in different space missions. Project description by means of knowledge about the theory of heat pipes, one is now able to carry out a basic calculation of a heat pipe. It is called a doublepipe exchanger because one fluid flows inside a pipe and the other fluid flows between that pipe and another pipe that surrounds the first. Pdf major applications of heat pipe and its advances coupled with. Figure 1 crosssectional view of a typical wicked heat pipe 2 3.
Power generation from waste heat using heat pipe and. New technology demonstration program, kennedy space. A heat pipe is a closed metal tube which transfers heat by natural convection with gasliquid change of phase. Heat pipe applications electronics cooling small high performance componentscause high heat fluxes and high heat dissipation demands. Initially, the oph is evacuated and partially filled with the working fluid. In the short heat pipe extreme 34 length, this effect is nearly zero, so please consult with wakefieldvette engineers to find the right solution for your application. This program will give a performance curve of a copperwater heat pipe with the given input values. Boiler blowdown heat recovery project reduces steam system energy losses at augusta newsprint. Design and demonstration of a heat exchanger for a compact natural gas compressor major qualifying project report submitted to the faculty of worcester polytechnic institute in partial fulfillment of the requirements for the degree of bachelor of science of mechanical engineering submitted by. A variety of liquids and wicks are used to make a heat pipe, but the principle is the same. Heat pipes do not actually dissipate the heat and are therefore incorporated into many different types of heat sinks as helpers. Heat pipes heat transport limit for proper heat pipe operation, the total pressure drop must not exceed its capillary pressure head. Evaporation and condensation of the working fluid is what gives heat pipes their high effective thermal conductivity, which can be as high as 100,000 wm k. Sep, 2012 kilopower project innovation a compact, low cost, fission reactor for exploration and science, scalable from 1 kw to 10 kw electric novel integration of available u235 fuel form, passive sodium heat pipes, and flightready stirling convertors would provide about 10x more power than the multi mission radioisotope thermoelectric.
Mechanical projects on modeling and fatigue analysis of automotive wheel rim. The doublepipe heat exchanger is one of the simplest types of heat exchangers. Heat pipe seminar presentation ppt linkedin slideshare. A heat pipe is a copper tube with an internal wick structure that. The following example, summarized in table 2, is presented to illustrate how heat pipes might be used to solve a thermal challenge for 70 w heat source with dimensions 20 mm x 20mm and a single 90 degree heat pipe bend required to transport heat from evaporator to condenser. The use of fin tubes in double pipe sections are normally economical if the annular heat transfer coefficient is less than 75% of the tube side coefficient. The main length of the heat pipe can be divided into three parts vz evaporator section, an adiabatic section and the condenser section.
866 548 592 540 306 812 694 279 1499 1160 970 909 1405 654 814 1268 539 1222 181 662 371 707 1091 465 749 1287 403 452 868 400 1212 1156 171 445 1259 366 130 178 110 873 1363 1219 1254 7 33 681 1172 1286 330